PHYSIOLOGY
DIFFERENT TYPE AND STRUCTURE OF MUSCLE FIBERS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which one of the following is a key characteristic of Fast Twitch B muscle fibers?
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They are Red in color, meaning they contain a lot of mitochondria
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They contract rapidly with great force but fatigue fast (as they use creatine phosphate pathway)
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They are recruited for long duration activities
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They contain high numbers of Mitochondria
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Explanation:
Detailed explanation-1: -Type IIa fibers, or fast oxidative glycolytic (FOG) fibers, present higher twitch speeds than type I fibers but are less fatigue resistant. Type IIx fibers, or fast glycolytic fibers, possess the fastest twitch speeds but are highly fatigable [1].
Detailed explanation-2: -There are two main types of twitch muscles: Fast twitch muscles. These muscles help with sudden bursts of energy involved in activities like sprinting and jumping.
There is 1 question to complete.